Lock pin



March 3,Y 1959 p. MICHALSKY LOCK PIN Filed April 2, 1954 INV Unilifd F41??? arent wir.

LOCK PIN Peter Michalsky, Garfield, N. J.

Application April 2, 1954, Serial No. 420,67 7

3 Claims. (Cl. 24--156) My invention relates to an improvement in a safety lock pin, in which a looped spring with its point or pin is made use of in conjunction with a clasp or shield having a locking mechanism thereon.

The objects of the invention are: iirst, to provide a looped spring having a smooth surface in combination with the clasp or the shield, secondly, to provide the facilities for the proper and easy adjustment of a locking mechanism in the clasp or shield connected to one leg of the pin. The locking mechanism means may or may not be used thereby permitting, independently of a lock, a safety lock pin that still can be fastened and unfastened without becoming locked, thirdly, to reduce by its structure the possibility of unnecessary binding of material in the lock pin, thereby preventing the trapping or clinging of the bound material which the lock pin has pinned together and fourthly, the clasp and locking mechanism is not limited only to a safety, locking pin but is also useful in lace pins and in combination with brooches, etc.

A form of the invention is illustrated by the drawing which is a plan View of the entire lock pin. The drawing shows an unlocked lock pin that is portrayed in the fastened position.

The best mode of operation of this invention is herein set forth in the detailed description that follows.

As preferred a looped spring is shown in the drawing as designated by reference numeral 2.

.The spring 2 is used to provide the spring action of the device. Legs 1 and 3 are preferably bent to form a loop 2 having a diameter less than the width of the shield 9. This is done for the purpose of having legs 1 and 3 closer together than the diameter of the loop 2 whereby a greater tension will be maintained in the spring. The spring is constructed from a smooth continuous piece of wire in the form of a three quarter circle as is shown in the drawing. The spring being free of any open spaces or corners in which material may become trapped or wedged in thus causing more diiiiculty in removing or freeing the pin and sometimes resulting in unwanted tears. As shown in the illustration, the looped spring is free from corners thus providing for a better appearance less bulkiness and no crevices in which material may be trapped. As seen at 4, the terminal end of leg 3 is anchored securely to the shield 9 and terminates near the middle portion 5 of the shield. This termination or encased section prevents rotation of the shield in relation to leg 3. By encasing the curved end of the leg 3, rotation of the shield 9 or the clasp 8, of the lock pin is prevented. Further the curved portion of leg 3 terminating at 5 provides means to effect a stronger and a more permanent bond and thus strengthens against any possible separation of the shield of the lock pin from the leg 3.

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` Location at 6 is a projection used as stop means that is preferably formed by pressing it out of the body of the shield. When the sliding locking mechanism 10 is pushed against the projection 6 and allowed to remain against this projection, the locking device is in its opened position. This opened or unlocked position which the drawing illustrates then permits the easy unfastening or fastening of the said lock pin when it is in this position.

A clasp 7 is formed by bending an elongated extension into a loop as shown at 8 in the drawing. When the lock pin is fastened, the locking mechanism 10 is manually moved from its resting place at the projection 6 to a position beneath and beyond the bent portion 7 and finally coming to rest in the loop 8. When the locking mechanism 10 is located in the loop 8 the lock pin is in the locked position thereby preventing accidental opening of the lock pin. The top portion 11 of the shield is utilized to receive the point of the pin and also carries the locking means 10, said top portion is substantially U-shaped in cross section. The point of the pin is used to pass through the material that is to be pinned together by the pin. The fasteningV and unfastening of the lock pin is accomplished by passing the pointed end of the lock pin in and out of the top portion of the shield.

The pin is opened by merely sliding the lock means 10 shown unlocked from its locked position to its unlocked position and pressing down on leg 1 in a conventional manner. It will be obvious to those skilled in the art that various changes may be made in the invention without departing from the spirit and scope thereof and therefore the invention is not limited by that which is shown in the drawing and described in the specification, but only as indicated in the appended claims.

I claim:

l. A safety pin plain unit comprising in combination a wire spring looped to form the legs of a pin, a shield provided upon one of the said legs as a fixed member substantially U-shaped in cross section, an encircling movable member indented for grasping mounted for longitudinal sliding movement upon the fixed member and the fixed member having on one end a limit stop and the other end has a tightly clasp loop on its top also as a limit stop between which ends 'the encircling movable mounted member is limited in its longitudinal back and forth sliding movement.

2. A safety pin plain unit comprising in combination a wire spring looped to form the legs of a pin, a shield provided upon one of the said legs as a fixed member substantially U-shaped in cross section, an encircling movable member indented for grasping mounted for longitudinal sliding movement upon the tixed member and the fixed member having on one end a limit stop and the other end has a tightly clasp loop on its top also as a limit stop between which ends the encircling movable mounted member is limited in its longitudinal back and forth sliding movement, the said tightly clasp loop on its top fixed member together with the encircling movably mounted member when Within it forming a lock that encircles the opposite leg of the pin.

3. A safety pin plain unit comprising in combination a wire spring looped to 'form the legs of a pin, a shield provided upon one of the said legs as a fixed member substantially U-shaped in cross section, an encircling movable member indented for grasping mounted for longitudinal sliding movement upon the fixed member and the fixed member having on one end a limit stop and the other end has a tightly clasp loo-p on its top 3 also as la limit stop between which ends the encircling movable'monted member is limited in its longitudinal back and forth sliding movement, the said tightly clasp loop on its top fixed member together with the encircling movably mounted member when Within it forming a lock that encircles the opposite leg of the pin, the leg encircled by the shield extends around half the enclosed,r shield throughaI right angle to prevent the rotationtof the, Ishield upon it.

References Cited in the le of Vthis pat-ent UNITED STATES PATENTS 

